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Kharisma Sulistya
Abstrak :
[ ABSTRAK
Antena mikrostrip saat ini banyak diaplikasikan dalam dunia telekomunikasi. Antena mikrostrip sendiri memiliki beberapa kelebihan jika dibandingkan dengan antena jenis lain, yaitu bentuknya yang tipis dan kecil, memiliki bobot yang ringan, mudah untuk difabrikasi, serta harga yang relatif murah. Berangkat dari keperluan untuk melakukan penelitian dengan tujuan mengetahui tingkat kematangan buah-buahan dengan menggunakan antena, maka dilakukan uji coba menggunakan antena mikrostrip serta melakukan pengujian terhadap nilai koefisien transmisi dan refleksi untuk memperoleh data yang nantinya dapat digunakan untuk pengembangan alat serta teknologi lebih lanjut. Koefisien transmisi dan refleksi ini bisa terjadi ketika propagasi gelombang elektromagnetik mengenai yang sebuah benda. Data hasil pengukuran nilai koefisien transmisi dan refleksi akan diperoleh dengan menggunakan antena mikrostrip serta Network Analyzer (NA) di dalam alat berwujud waveguide. Dengan parameter pengukuran meliputi jarak, posisi, nilai parameter S11, S21 permitivitas dan jenis bahan. Pada skripsi ini telah dilakukan pengukuran data dengan membandingkan parameter S21 pada antena mikrostrip dengan beberapa variasi jenis benda yaitu, buah labu, buah semangka, balon garam dan balon gula. Dari hasil pengukuran diketahui bahwa nilai S21 yang paling tinggi dimiliki oleh buah labu matang nilai S21 sebesar -32,9 dB, pada buah semangka matang nilai S21 sebesar -39,7 dB, balon air garam S21 sebesar -43,52 dB, balon gula S21 sebesar -48,56 dB, labu mentah -50.09 dB dan semangka mentah -52.22 dB. Dari beberapa data pengukuran diatas, dapat diambil kesimpulan bahwa semakin rendah nilai kepadatan dan kerapatan benda uji, semakin kecil nilai koefisien transmisi dan refleksi. Dari hasil penelitian berikut ini diharapkan dapat digunakan untuk pengembangan alat pada masa yang akan datang, serta metode alternatif untuk mendeteksi tingkat kematangan buah dengan memanfaatkan antena mikrostrip serta nilai koefisien transmisi dan refleksi.
ABSTRACT Microstrip antenna is now widely applied in telecommunications. Microstrip antenna has several advantages when compared with other types of antennas, which is its thin and small, has a light weight, easy to be fabricated, and the price is relatively cheap. The aim of this research is to figuring out the level of fruit?s maturity using the antenna. Data can be obtained by using a microstrip antenna as well as some test of the Coefficient Transmission and Reflection factor. Afterward the data can be used in developing advanced technologies in the next future. Coefficient Transmission and Reflection can occur when electromagnetic wave get on to the object, Transmission loss measurement data will be obtained by using a microstip antenna array and Network Analyzer (NA) in the Waveguide Chamber. This measurenment using some parameter such as distance, position, value?s parameter S11, S21, permitivity and type of materials. The research has been done by comparing the data in the parameter S21 in a microstrip antenna using some materials which are a pumpkin, watermelon, balloon filled with saline and ballon containing sugar. The study shows that the highest value of S21 from a ripe pumpkin is -32,9 dB, followed by a ripe watermelon -39,7 dB, balloon filled with saline -43,52 dB, ballon containing sugar -48,56 dB, raw pumpkin -50.09 dB and a raw watermelon -52,22 dB. Furthermore, it can be concluded that the density of an object affects the value of the Coefficient Transmission and Reflection. Afterward, the data can be used in developing tools and alternative methods for detecting the level of fruit?s maturity by using a microstrip antenna and Coefficient Transmission and Reflection value. ;Microstrip antenna is now widely applied in telecommunications. Microstrip antenna has several advantages when compared with other types of antennas, which is its thin and small, has a light weight, easy to be fabricated, and the price is relatively cheap. The aim of this research is to figuring out the level of fruit?s maturity using the antenna. Data can be obtained by using a microstrip antenna as well as some test of the Coefficient Transmission and Reflection factor. Afterward the data can be used in developing advanced technologies in the next future. Coefficient Transmission and Reflection can occur when electromagnetic wave get on to the object, Transmission loss measurement data will be obtained by using a microstip antenna array and Network Analyzer (NA) in the Waveguide Chamber. This measurenment using some parameter such as distance, position, value?s parameter S11, S21, permitivity and type of materials. The research has been done by comparing the data in the parameter S21 in a microstrip antenna using some materials which are a pumpkin, watermelon, balloon filled with saline and ballon containing sugar. The study shows that the highest value of S21 from a ripe pumpkin is -32,9 dB, followed by a ripe watermelon -39,7 dB, balloon filled with saline -43,52 dB, ballon containing sugar -48,56 dB, raw pumpkin -50.09 dB and a raw watermelon -52,22 dB. Furthermore, it can be concluded that the density of an object affects the value of the Coefficient Transmission and Reflection. Afterward, the data can be used in developing tools and alternative methods for detecting the level of fruit?s maturity by using a microstrip antenna and Coefficient Transmission and Reflection value. ;Microstrip antenna is now widely applied in telecommunications. Microstrip antenna has several advantages when compared with other types of antennas, which is its thin and small, has a light weight, easy to be fabricated, and the price is relatively cheap. The aim of this research is to figuring out the level of fruit?s maturity using the antenna. Data can be obtained by using a microstrip antenna as well as some test of the Coefficient Transmission and Reflection factor. Afterward the data can be used in developing advanced technologies in the next future. Coefficient Transmission and Reflection can occur when electromagnetic wave get on to the object, Transmission loss measurement data will be obtained by using a microstip antenna array and Network Analyzer (NA) in the Waveguide Chamber. This measurenment using some parameter such as distance, position, value?s parameter S11, S21, permitivity and type of materials. The research has been done by comparing the data in the parameter S21 in a microstrip antenna using some materials which are a pumpkin, watermelon, balloon filled with saline and ballon containing sugar. The study shows that the highest value of S21 from a ripe pumpkin is -32,9 dB, followed by a ripe watermelon -39,7 dB, balloon filled with saline -43,52 dB, ballon containing sugar -48,56 dB, raw pumpkin -50.09 dB and a raw watermelon -52,22 dB. Furthermore, it can be concluded that the density of an object affects the value of the Coefficient Transmission and Reflection. Afterward, the data can be used in developing tools and alternative methods for detecting the level of fruit?s maturity by using a microstrip antenna and Coefficient Transmission and Reflection value. ;Microstrip antenna is now widely applied in telecommunications. Microstrip antenna has several advantages when compared with other types of antennas, which is its thin and small, has a light weight, easy to be fabricated, and the price is relatively cheap. The aim of this research is to figuring out the level of fruit?s maturity using the antenna. Data can be obtained by using a microstrip antenna as well as some test of the Coefficient Transmission and Reflection factor. Afterward the data can be used in developing advanced technologies in the next future. Coefficient Transmission and Reflection can occur when electromagnetic wave get on to the object, Transmission loss measurement data will be obtained by using a microstip antenna array and Network Analyzer (NA) in the Waveguide Chamber. This measurenment using some parameter such as distance, position, value?s parameter S11, S21, permitivity and type of materials. The research has been done by comparing the data in the parameter S21 in a microstrip antenna using some materials which are a pumpkin, watermelon, balloon filled with saline and ballon containing sugar. The study shows that the highest value of S21 from a ripe pumpkin is -32,9 dB, followed by a ripe watermelon -39,7 dB, balloon filled with saline -43,52 dB, ballon containing sugar -48,56 dB, raw pumpkin -50.09 dB and a raw watermelon -52,22 dB. Furthermore, it can be concluded that the density of an object affects the value of the Coefficient Transmission and Reflection. Afterward, the data can be used in developing tools and alternative methods for detecting the level of fruit?s maturity by using a microstrip antenna and Coefficient Transmission and Reflection value. , Microstrip antenna is now widely applied in telecommunications. Microstrip antenna has several advantages when compared with other types of antennas, which is its thin and small, has a light weight, easy to be fabricated, and the price is relatively cheap. The aim of this research is to figuring out the level of fruit’s maturity using the antenna. Data can be obtained by using a microstrip antenna as well as some test of the Coefficient Transmission and Reflection factor. Afterward the data can be used in developing advanced technologies in the next future. Coefficient Transmission and Reflection can occur when electromagnetic wave get on to the object, Transmission loss measurement data will be obtained by using a microstip antenna array and Network Analyzer (NA) in the Waveguide Chamber. This measurenment using some parameter such as distance, position, value’s parameter S11, S21, permitivity and type of materials. The research has been done by comparing the data in the parameter S21 in a microstrip antenna using some materials which are a pumpkin, watermelon, balloon filled with saline and ballon containing sugar. The study shows that the highest value of S21 from a ripe pumpkin is -32,9 dB, followed by a ripe watermelon -39,7 dB, balloon filled with saline -43,52 dB, ballon containing sugar -48,56 dB, raw pumpkin -50.09 dB and a raw watermelon -52,22 dB. Furthermore, it can be concluded that the density of an object affects the value of the Coefficient Transmission and Reflection. Afterward, the data can be used in developing tools and alternative methods for detecting the level of fruit’s maturity by using a microstrip antenna and Coefficient Transmission and Reflection value. ]
Depok: Fakultas Teknik Universitas Indonesia, 2016
S62095
UI - Skripsi Membership  Universitas Indonesia Library
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Neysa Sheliza Putri Dharma
Abstrak :
Penelitian ini bertujuan untuk menganalisis konsistensi penerjemahan dalam majalah NADI vol. 28 tahun 2021 pada artikel berjudul "Digitalisasi, Solusi Pemulihan Ekonomi?" dengan menggunakan unsur makro dan mikro melalui skema W-Frage oleh Christiane Nord. Penelitian bertujuan untuk memberikan pemahaman yang lebih baik tentang konsistensi penerjemahan dalam konteks media komunikasi. Berdasarkan hasil penelitian, terdapat 7 alasan yang menyebabkan ketidakkonsistenan antara TSu (teks sumber) dan TSa (teks sasaran). Setelah diteliti secara keseluruhan, ketidakkonsistenan pada teks terjadi karena penerjemah memperhatikan konvensi budaya sasaran dan menggunakan metode komunikatif guna memperjelas maksud dari kalimat. ......This study aims to analyze the consistency of translation in NADI magazine vol. 28 of 2021 in the article titled "Digitalisation, Solution for Economic Recovery?" by using macro and micro elements through Christiane Nord's W-Frage scheme. The research aims to provide a better understanding of translation consistency in the context of communication media. Based on the research results, there are 7 reasons that cause inconsistency between TSu (source text) and TSa (target text). After an overall study, the inconsistency in the text occurs because the translator pays attention to the conventions of the target culture and uses communicative methods to clarify the meaning of the sentence.
Depok: Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2023
MK-pdf
UI - Makalah dan Kertas Kerja  Universitas Indonesia Library
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Ryan Cipta
Abstrak :
Transmisi elektron mikroskop TEM dan ukuran partikel analyzer PSA adalahinstrumen umum untuk penentuan distribusi ukuran nanopartikel emas Aunp. Namun, teknikini tidak selalu berlaku karena harga alat dan biaya pemeliharaan yang mahal. Penelitian inimelaporkan pengaruh arus transien pada tumbukan aktif elektrokimia antara individu Aunpdengan permukaan mikroelektroda boron-doped diamond BDD. Hal ini juga diketahui bahwahidrogen peroksida H2O2 tidak aktif di permukaan BDD. Namun, dengan adanya Aunp reaksioksidasi-reduksi H2O2 terjadi. Selanjutnya, ukuran Aunp mempengaruhi arus yang dihasilkan.Oleh karena itu, korelasi antara transien saat ini dengan ukuran AuNPs dapat digunakan untukmenganalisis distribusi ukuran Aunp. Aunp telah berhasil disintesis menggunakan metodereduksi HAuCl4 oleh sodium sitrat. Ukuran AuNP dari 10-100 nm sudah disiapkan. Korelasiantara arus transient yang dihasilkan oleh reaksi reduksi H2O2 oleh tumbukan Aunp dipermukaanmikroelektroda BDD dengan ukuran nanopartikel yang diukur dengan menggunakan TEM danPSA, dapat dideterminasi bahwa metode ini dapat diterapkan untuk penentuan distribusi ukurannanometal.
Transmission electron microscopy TEM and particle size analyzer PSA are thegeneral instruments for the determination of size distribution of gold nanoparticle AuNP. However, these techniques are not always applicable because the price of instrument and the costof maintenance are expensive. This research reports the effect of transient currents onelectrochemical active collisions between individual AuNP with the surface of boron dopeddiamond BDD microelectrodes. It is well known that hydrogen peroxide H2O2 is inactive atthe surface of BDD. However, in the presence of AuNP oxidation reduction reaction of H2O2occurs. Furthermore, the size of AuNP affects the current generated. Therefore, correlationbetween the current transients with AuNPs size can be used to analyze the distribution of AuNPsize. AuNP has been successfully synthesized using the method of reduction HAuCl4 by sodiumcitrate. The size of 10 100 nm AuNPs can be prepared. Correlation between with the size of thenanoparticles measured by TEM and PSA with the current transient generated by the reductionreaction of H2O2 with AuNP collision at BDD microelectrodes suggested that the method can beapplied for the determination of nanometal size distribution.
Depok: Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2016
T-Pdf
UI - Tesis Membership  Universitas Indonesia Library
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Qurrotainun, Mardiyyah Ahmad
Abstrak :
Pendahuluan: Salah satu faktor virulensi utama yang mempengaruhi perubahan Candida albicans(C. albicans) dari flora komensal menjadi patogen adalah pembentukan biofilm. Pada biofilm fase maturasi, C. albicansmenjadi lebih resisten terhadap agen antifungal. Telah dibuktikan efek inhibisi ekstrak etanol temulawak (Curcuma xanthorrhiza Roxb.) terhadap pertumbuhan biofilm C. albicans. Tujuan: Menganalisis gambaran TEM sel C. albicans ATCC 10231pada biofilm fase maturasi yang terinhibisi ekstrak etanol temulawak (EET). Metode: Penelitian ini dibagi dua kelompok yaitu kelompok perlakuan dan tanpa perlakuan. Sebanyak 100μL suspensi C. albicans ATCC 10231dalam 96-well-plate diinkubasi selama 1.5 jam pada 370C,kemudian diaspirasi dan dibilas menggunakan PBS. Pada kelompok perlakuan dipapar 100μLEET dengan konsentrasi KHBM50(35%), sedangkan kelompok tanpa perlakuan tidak dipapar EET. Kedua kelompok di inkubasi kembali hingga 48 jam, kemudian dipindahkan ke Eppendorf tube untuk difiksasi dalam 2.5% glutaraldehyde dan dilakukan pemeriksaan TEM. Kontrol positif dipapar nystatin oral suspension. Hasil: Pemeriksaan TEM pada kelompok perlakuan, sel C. albicansATCC 10231 pada biofilm fase maturasi yang terpapar ekstrak etanol temulawak terlihat perubahan gambaran ultrastruktur yang berupa perubahan bentuk sel, penebalan dinding sel, pembesaran vakuola, dan iregularitas sitoplasma berikut organel-organel di dalamnya seperti disorganisasi pada nukleus, mitokondria, dan retikulum endoplasma. Sedangkan pada kelompok tanpa perlakuan menunjukan gambaran sel C. albicans ATCC 10231 normal. Kesimpulan: Pemeriksaan TEM dapat menunjukkan perubahan sel C. albicans ATCC 10231 pada biofilm fase maturasi yang terinhibisi ekstrak etanol temulawak. ...... Introduction: One of main virulence factor that influence the alteration of Candida albicans (C. albicans) from commensal flora into pathogenic flora is biofilm formation. At the maturation phase, C. albicans ismore resistant to antifungal agent. It has been proven that there is an inhibition effect of Javanese turmeric (Curcuma xanthorrhiza Roxb) on the growth of C. albicans biofilm. Objective: To analyze the TEM image of C. albicans cell on the maturation phase of biofilm inhibit by Javanese turmeric ethanol extract. Method: This research divided into two groups, there were treated group and untreated group. A 100μLC. albicans ATCC 10231 suspension on a 96-well-plate incubated for 1.5 hour at 370C, and then aspirated and washed by phosphate buffer saline (PBS). The treated group was exposed to 100μL Javanese turmeric ethanol extract as MBIC50 concentration (35%), while the untreated group was not exposed to Javanese turmeric ethanol extract. Both groups were incubated until 48 h, and then moved into the Eppendorf tube and fixed with glutaraldehyde 2.5% to examine using TEM. The positive control was exposed to nystatin oral suspension. Result: Compared to the negative control, C. albicans cell on biofilm maturation phase treated by Javanese turmeric extract ethanol extract shows the alteration on the its ultra structure. The alteration showed in shape, the thickness of cell wall, the enlargement of vacuole, and irregularity of cytoplasm include the organelles in it such as disorganization on nucleus, cytoplasm, and endoplasmic reticulum. Conclusion: TEM examination showed the alteration of C. albicans ATCC 10231 cell on maturation phase biofilm inhibited by Javanese turmeric ethanol extract.
Jakarta: Fakultas Kedokteran Gigi Universitas Indonesia, 2018
S-Pdf
UI - Skripsi Membership  Universitas Indonesia Library
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Tutik Setianingsih, 1969-
Malang: UB Press, 2017
620.1 TUT m
Buku Teks  Universitas Indonesia Library
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Abstrak :
This book presents the recent advances that have been made using mathematical methods to resolve problems in microscopy. With improvements in hardware-based aberration software significantly expanding the nanoscale imaging capabilities of scanning transmission electron microscopes (STEM), these mathematical models can replace some labor intensive procedures used to operate and maintain STEMs. This book, will also cover such relevant concepts as superresolution techniques, special denoising methods, application of mathematical/statistical learning theory, and compressed sensing.
New York: Springer, 2012
e20405933
eBooks  Universitas Indonesia Library